• 关于

    file_exists()

    的搜索结果

问题

从csv文件读取输入时,如何在Cassandra中插入数据时达到50k / s的吞吐量?

一码平川MACHEL 2019-12-01 19:32:16 602 浏览量 回答数 1

回答

Re如何开启filegetcontents 转的: file_get_contents函数的使用示例: < ?php $file_contents = file_get_contents('http://www.ccvita.com/'); echo $file_contents; ?> 换成curl函数的使用示例: < ?php $ch = curl_init(); $timeout = 5; curl_setopt ($ch, CURLOPT_URL, 'http://www.ccvita.com'); curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout); $file_contents = curl_exec($ch); curl_close($ch); echo $file_contents; ?> 利用function_exists函数来判断php是否支持一个函数可以轻松写出下面函数 < ?php function vita_get_url_content($url) { if(function_exists('file_get_contents')) { $file_contents = file_get_contents($url); } else { $ch = curl_init(); $timeout = 5; curl_setopt ($ch, CURLOPT_URL, $url); curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout); $file_contents = curl_exec($ch); curl_close($ch); } return $file_contents; } ?> 其实上面的这个函数还有待商榷,如果你的主机服务商把file_get_contents和curl都关闭了,上面的函数就会出现错误。

shanw 2019-12-02 02:05:25 0 浏览量 回答数 0

问题

可以转成java吗?

你好世界123 2019-12-01 20:02:19 1139 浏览量 回答数 3

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问题

如何利用python脚本启动spring boot项目?? 400 报错

爱吃鱼的程序员 2020-06-04 16:30:27 1 浏览量 回答数 1

问题

函数中按位异或操作的作用是啥?

小旋风柴进 2019-12-01 20:08:57 1153 浏览量 回答数 1

问题

android 开发中文件名错误

蛮大人123 2019-12-01 20:02:26 850 浏览量 回答数 1

回答

其中bug存在两个方面, 1、在windowns中,当文件只有只读属性时,is_writeable()函数才返回false,当返回true时,该文件不一定是可写的。 如果是目录,在目录中新建文件并通过打开文件来判断; 如果是文件,可以通过打开文件(fopen),来测试文件是否可写。 2、在Unix中,当php配置文件中开启safe_mode时(safe_mode=on),is_writeable()同样不可用。 读取配置文件是否safe_mode是否开启。 /** * Tests for file writability * * is_writable() returns TRUE on Windows servers when you really can't write to * the file, based on the read-only attribute. is_writable() is also unreliable * on Unix servers if safe_mode is on. * * @access private * @return void */if ( ! function_exists('is_really_writable')) { function is_really_writable($file) { // If we're on a Unix server with safe_mode off we call is_writable if (DIRECTORY_SEPARATOR == '/' AND @ini_get("safe_mode") == FALSE) { return is_writable($file); } // For windows servers and safe_mode "on" installations we'll actually // write a file then read it. Bah... if (is_dir($file)) { $file = rtrim($file, '/').'/'.md5(mt_rand(1,100).mt_rand(1,100)); if (($fp = @fopen($file, FOPEN_WRITE_CREATE)) === FALSE) { return FALSE; } fclose($fp); @chmod($file, DIR_WRITE_MODE); @unlink($file); return TRUE; } elseif ( ! is_file($file) OR ($fp = @fopen($file, FOPEN_WRITE_CREATE)) === FALSE) { return FALSE; } fclose($fp); return TRUE; } }

珍宝珠 2019-12-02 03:16:42 0 浏览量 回答数 0

问题

Ruby中的反向DNS

游客ufivfoddcd53c 2020-01-03 15:49:44 2 浏览量 回答数 1

回答

您好,可以使用urlretrieve()函数,具体代码: import os,statimport urllib.request img_url="http://gw.alicdn.com/tfs/TB1CPcAwntYBeNjy1XdXXXXyVXa-350-350.jpg"file_path='D:/book/img'file_name ="pyt" try: #是否有这个路径 if not os.path.exists(file_path): #创建路径 os.makedirs(file_path) #获得图片后缀 file_suffix = os.path.splitext(img_url)[1] print(file_suffix) #拼接图片名(包含路径) filename = '{}{}{}{}'.format(file_path,os.sep,file_name,file_suffix) print(filename) #下载图片,并保存到文件夹中 urllib.request.urlretrieve(img_url,filename=filename) except IOError as e: print("IOError") except Exception as e: print("Exception")

bbskkb 2019-12-02 01:09:36 0 浏览量 回答数 0

问题

在JGiven的测试场景中实施测试用例

养狐狸的猫 2019-12-01 20:00:26 1 浏览量 回答数 0

回答

是不是在gpstop前,进程以及不在了呢? 看了一下gpstop的脚本,这个问题是由于KILL一个不存在的进程引起的,说明正常停库了。gpstop会尝试先停库,然后不管有没有停掉,都会去KILL。 ###### def _stop_master(self,masterOnly=False): ''' shutsdown the master ''' self.conn = dbconn.connect(self.dburl, utility=True) self._stop_master_checks() self.conn.close() e = GpEraFile(self.master_datadir, logger=get_logger_if_verbose()) e.end_era() logger.info("Commencing Master instance shutdown with mode=%s" % self.mode) logger.info("Master segment instance directory=%s" % self.master_datadir) cmd=gp.MasterStop("stopping master", self.master_datadir, mode=self.mode, timeout=self.timeout) try: cmd.run(validateAfter=True) except: # Didn't stop in timeout or pg_ctl failed. So try kill (succeeded,mypid,file_datadir)=pg.ReadPostmasterTempFile.local("Read master tmp file", self.dburl.pgport).getResults() if succeeded and file_datadir == self.master_datadir: if unix.check_pid(mypid): logger.info("Failed to shutdown master with pg_ctl.") logger.info("Sending SIGQUIT signal...") os.kill(mypid,signal.SIGQUIT) time.sleep(5) # Still not gone... try SIGABRT if unix.check_pid(mypid): logger.info("Sending SIGABRT signal...") os.kill(mypid,signal.SIGABRT) time.sleep(5) if not unix.check_pid(mypid): # Clean up files lockfile="/tmp/.s.PGSQL.%s" % self.dburl.pgport if os.path.exists(lockfile): logger.info("Clearing segment instance lock files") os.remove(lockfile) logger.info('Attempting forceful termination of any leftover master process') (succeeded,mypid,file_datadir)=pg.ReadPostmasterTempFile.local("Read master tmp file", self.dburl.pgport).getResults() unix.kill_9_segment_processes(self.master_datadir, self.dburl.pgport, mypid) logger.debug("Successfully shutdown the Master instance in admin mode") GPSTOP的逻辑引起的错误,首先GPSTOP会正常关闭master,然后会KILL master。如果正常关闭了,gpstop还是会去kill。所以只要正常关闭了master,就一定会报这个ERROR。代码在gpstop中可以看到。

德哥 2019-12-02 01:32:15 0 浏览量 回答数 0

回答

Re數據庫帳戶的權限 主要是遇到了這樣的錯誤訊息 請問有人知道原因嗎? 謝謝 安装失败。 异常: 执行 SQL 文件“UninstallMembership.sql”时发生错误。SQL 错误号为 50000,SqlException 消息为: Current user foxtester01 have no permission . The transaction ended in the trigger. The batch has been aborted. Changed database context to 'sp4ff196a927cf8'. Cannot grant, deny, or revoke permissions to sa, dbo, entity owner, information_schema, sys, or yourself. ---------------------------------------- 故障的详细信息 ---------------------------------------- SQL Server: 数据库: [sp4ff196a927cf8] 加载的 SQL 文件: UninstallMembership.sql 命令失败: USE [sp4ff196a927cf8] DECLARE @command nvarchar(4000) DECLARE @RemoveAllRoleMembersExits bit SET @RemoveAllRoleMembersExits = 0 IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[aspnet_UnRegisterSchemaVersion]') AND OBJECTPROPERTY(id, N'IsProcedure') = 1) BEGIN     SET @command = 'GRANT EXECUTE ON [dbo].aspnet_UnRegisterSchemaVersion TO '   QUOTENAME(user)     EXEC (@command) END IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[aspnet_Setup_RemoveAllRoleMembers]') AND OBJECTPROPERTY(id, N'IsProcedure') = 1) BEGIN     SET @RemoveAllRoleMembersExits = 1     SET @command = 'GRANT EXECUTE ON [dbo].aspnet_Setup_RemoveAllRoleMembers TO '   QUOTENAME(user)     EXEC (@command) END IF EXISTS ( SELECT * FROM sysusers WHERE issqlrole = 1 AND name = N'aspnet_Membership_FullAccess'  ) BEGIN   IF (@RemoveAllRoleMembersExits = 1)      EXEC [dbo].[aspnet_Setup_RemoveAllRoleMembers] N'aspnet_Membership_FullAccess'   EXEC sp_droprole N'aspnet_Membership_FullAccess' END IF EXISTS ( SELECT * FROM sysusers WHERE issqlrole = 1 AND name = N'aspnet_Membership_BasicAccess'  ) BEGIN   IF (@RemoveAllRoleMembersExits = 1)      EXEC [dbo].[aspnet_Setup_RemoveAllRoleMembers] N'aspnet_Membership_BasicAccess'   EXEC sp_droprole N'aspnet_Membership_BasicAccess' END IF EXISTS ( SELECT * FROM sysusers WHERE issqlrole = 1 AND name = N'aspnet_Membership_ReportingAccess'  ) BEGIN   IF (@RemoveAllRoleMembersExits = 1)      EXEC [dbo].[aspnet_Setup_RemoveAllRoleMembers] N'aspnet_Membership_ReportingAccess'   EXEC sp_droprole N'aspnet_Membership_ReportingAccess' END IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[aspnet_Membership_CreateUser]') AND OBJECTPROPERTY(id, N'IsProcedure') = 1) DROP PROCEDURE [dbo].[aspnet_Membership_CreateUser] IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[aspnet_Membership_GetUserByName]') AND OBJECTPROPERTY(id, N'IsProcedure') = 1) DROP PROCEDURE [dbo].[aspnet_Membership_GetUserByName] IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[aspnet_Membership_GetUserByEmail]') AND OBJECTPROPERTY(id, N'IsProcedure') = 1) DROP PROCEDURE [dbo].[aspnet_Membership_GetUserByEmail] IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[aspnet_Membership_GetPassword]') AND OBJECTPROPERTY(id, N'IsProcedure') = 1) DROP PROCEDURE [dbo].[aspnet_Membership_GetPassword] IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[aspnet_Membership_GetPasswordWithFormat]') AND OBJECTPROPERTY(id, N'IsProcedure') = 1) DROP PROCEDURE [dbo].[aspnet_Membership_GetPasswordWithFormat] IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[aspnet_Membership_UpdateUserInfo]') AND OBJECTPROPERTY(id, N'IsProcedure') = 1) DROP PROCEDURE [dbo].[aspnet_Membership_UpdateUserInfo] IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[aspnet_Membership_SetPassword]') AND OBJECTPROPERTY(id, N'IsProcedure') = 1) DROP PROCEDURE [dbo].[aspnet_Membership_SetPassword] IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[aspnet_Membership_ResetPassword]') AND OBJECTPROPERTY(id, N'IsProcedure') = 1) DROP PROCEDURE [dbo].[aspnet_Membership_ResetPassword] IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[aspnet_Membership_UpdateUser]') AND OBJECTPROPERTY(id, N'IsProcedure') = 1) DROP PROCEDURE [dbo].[aspnet_Membership_UpdateUser] IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[aspnet_Membership_ChangePasswordQuestionAndAnswer]') AND OBJECTPROPERTY(id, N'IsProcedure') = 1) DROP PROCEDURE [dbo].[aspnet_Membership_ChangePasswordQuestionAndAnswer] IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[aspnet_Membership_GetAllUsers]') AND OBJECTPROPERTY(id, N'IsProcedure') = 1) DROP PROCEDURE [dbo].[aspnet_Membership_GetAllUsers] IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[aspnet_Membership_GetNumberOfUsersOnline]') AND OBJECTPROPERTY(id, N'IsProcedure') = 1) DROP PROCEDURE [dbo].[aspnet_Membership_GetNumberOfUsersOnline] IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[aspnet_Membership_FindUsersByName]') AND OBJECTPROPERTY(id, N'IsProcedure') = 1) DROP PROCEDURE [dbo].[aspnet_Membership_FindUsersByName] IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[aspnet_Membership_FindUsersByEmail]') AND OBJECTPROPERTY(id, N'IsProcedure') = 1) DROP PROCEDURE [dbo].[aspnet_Membership_FindUsersByEmail] IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[aspnet_Membership_GetUserByUserId]') AND OBJECTPROPERTY(id, N'IsProcedure') = 1) DROP PROCEDURE [dbo].[aspnet_Membership_GetUserByUserId] IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[aspnet_Membership_UnlockUser]') AND OBJECTPROPERTY(id, N'IsProcedure') = 1) DROP PROCEDURE [dbo].[aspnet_Membership_UnlockUser] IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[aspnet_Membership]') AND OBJECTPROPERTY(id, N'IsUserTable') = 1) DROP TABLE [dbo].[aspnet_Membership] IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[vw_aspnet_MembershipUsers]') AND OBJECTPROPERTY(id, N'IsView') = 1) DROP VIEW [dbo].[vw_aspnet_MembershipUsers] IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[aspnet_UnRegisterSchemaVersion]') AND OBJECTPROPERTY(id, N'IsProcedure') = 1) BEGIN     EXEC [dbo].aspnet_UnRegisterSchemaVersion N'Membership', N'1'     SET @command = 'REVOKE EXECUTE ON [dbo].aspnet_UnRegisterSchemaVersion FROM '   QUOTENAME(user)     EXEC (@command) END IF (@RemoveAllRoleMembersExits = 1) BEGIN     SET @command = 'REVOKE EXECUTE ON [dbo].aspnet_Setup_RemoveAllRoleMembers FROM '   QUOTENAME(user)     EXEC (@command) END PRINT '----------------------------------------------' PRINT 'Completed execution of UninstallMembership.SQL' PRINT '----------------------------------------------' SQL 异常: System.Data.SqlClient.SqlException: Current user foxtester01 have no permission . The transaction ended in the trigger. The batch has been aborted. Changed database context to 'sp4ff196a927cf8'. Cannot grant, deny, or revoke permissions to sa, dbo, entity owner, information_schema, sys, or yourself.    在 System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)    在 System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)    在 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)    在 System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)    在 System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async)    在 System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe)    在 System.Data.SqlClient.SqlCommand.ExecuteNonQuery()    在 System.Web.Management.SqlServices.ExecuteFile(String file, String server, String database, String dbFileName, SqlConnection connection, Boolean sessionState, Boolean isInstall, SessionStateType sessionStatetype) ------------------------- 回2楼nono20011908的帖子 目前還在試用中,售後能支持嗎? 正試著把系統裝上去但遇到不少問題, 還在評估中……

foxtester01 2019-12-02 03:14:08 0 浏览量 回答数 0

问题

Android中GridView如何改变所有图片的中状态

爵霸 2019-12-01 19:38:14 925 浏览量 回答数 0

问题

destoon 的上传文件upload.php怎么整合oss

nemovip 2019-12-01 20:21:22 1287 浏览量 回答数 1

问题

django 上传一个带有中文名的照片的时候,出现了以下错误:“'ascii' codec can't encode characters in position 50-52: ordinal not in range(128)”

a123456678 2019-12-01 20:00:23 2047 浏览量 回答数 1

问题

php做控制下载速度代码 为什么又生带宽,又省cpu 和内存呢?

小旋风柴进 2019-12-01 20:09:16 1035 浏览量 回答数 1

问题

Python:在Postgres中插入大型dataframe (1.2M行)的问题

kun坤 2019-12-30 09:34:45 0 浏览量 回答数 0

回答

你的json文件有bom头, $json = file_get_contents('Qcode.json'); $arr = json_decode(trim($json, chr(239) . chr(187) . chr(191)), true); $temp = array_column($arr, 'dkey', 'dvalue'); echo $temp['A05']; if (! function_exists('array_column')) { function array_column(array $input, $columnKey, $indexKey = null) { $array = array(); foreach ($input as $value) { if (! isset($value[$columnKey])) { trigger_error("Key \"$columnKey\" does not exist in array"); return false; } if (is_null($indexKey)) { $array[] = $value[$columnKey]; } else { if (! isset($value[$indexKey])) { trigger_error("Key \"$indexKey\" does not exist in array"); return false; } if (! is_scalar($value[$indexKey])) { trigger_error("Key \"$indexKey\" does not contain scalar value"); return false; } $array[$value[$indexKey]] = $value[$columnKey]; } }

a123456678 2019-12-02 02:05:01 0 浏览量 回答数 0

回答

import os def is_file_exist(f): return os.path.exists(f) if __name__ == '__main__': print(is_file_exist(__file__))

知钵 2019-12-02 01:06:00 0 浏览量 回答数 0

问题

想问下这段代码是什么含义呀?

幸福量子 2019-12-01 20:03:45 1125 浏览量 回答数 0

问题

shareSDK第三方登录,返回了用户登录信息,但是一直报空指针异常,可是有返回值

爵霸 2019-12-01 19:33:25 2143 浏览量 回答数 0

问题

写了一个简单的html/php上传的网页,在安卓和电脑上都正常,但ipad上都有问题,即图片上传名称都自动变成image.jpg

杨冬芳 2019-12-01 20:01:11 1003 浏览量 回答数 1

问题

pip install 报错?报错

爱吃鱼的程序员 2020-06-14 16:19:45 0 浏览量 回答数 1

问题

uri字符串不能在android中缓存

蛮大人123 2019-12-01 20:02:33 928 浏览量 回答数 1

问题

android创建和删除文件夹

爵霸 2019-12-01 19:47:06 855 浏览量 回答数 1

问题

android创建和删除文件夹

爵霸 2019-12-01 19:42:17 810 浏览量 回答数 1

问题

关于python的一个报错问题?报错

爱吃鱼的程序员 2020-06-06 09:59:24 0 浏览量 回答数 1

问题

创建文件:内容:属性,给出错误

爵霸 2019-12-01 19:28:17 1077 浏览量 回答数 0

问题

php本地测试没有显示内容,也没有报错,是什么情况?

小旋风柴进 2019-12-01 20:11:38 1118 浏览量 回答数 1

问题

如何安装 php 的zip模块

奎因宅 2019-12-01 20:13:51 3583 浏览量 回答数 1
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